Hi Ben,
There's a subtle wording in TEM questions that can trip you – it certainly did during my study!
• The stall warning device is indeed a Systemic Counter-measure that aims ensure proper pilot actions.
• The activation of the stall-warning means the aircraft is in an undesired state (particularly if its unexpected).
• The pilot corrects this undesired state (which they discovered through the stall warning) through a proper recovery action - that action is a review-counter measure in TEM lingo.

With this background, review the screenshot you posted – it explains it quite well

Cheers
SJM